A simulation of the global climate between 1850 and 2500, which has been published in Scientific Reports, has modelled the global temperature and sea level rises during that time period.
The modelling suggests that under conditions where greenhouse gas emissions peak during the 2030s and decline to zero by 2100, global temperatures will be 3 degrees Celsius warmer and sea levels 3 metres higher by 2500 than they were in 1850.
Under conditions where all manmade greenhouse-gas emissions are reduced to zero during the year 2020, the authors estimate that, after an initial decline, global temperatures will still be around 3°C warmer and sea levels will rise by around 2.5 metres by 2500, compared to 1850.
Even without additional carbon being pumped into the atmosphere, continued melting of Arctic ice and carbon-containing permafrost may increase emissions of the greenhouse gases water vapour, methane and carbon dioxide.
Melting of Arctic ice and permafrost...